In a sea of black and white penguins waddling on Antarctica's Aitcho Islands , National Geographic Explorers spotted an extremely rare, nearly all-white Chinstrap penguin this week. Rare White Penguin Spotted in Antarctica (ABC News) David Stephens , a naturalist on board the Lindblad Expeditions' National Geographic Explorer ship , snapped the photo above of the rare leucistic bird, which he described on their blog as "whitish, but not quite an albino." Leucistic penguins, sometime referred to as albinistic penguins , have a reduced level of pigmentation and are set apart from albinos due to their pigmented eyes, according to National Geographic . Their "washed-out" coloring clearly distinguishes them from the traditional black and white coat of the Chinstrap penguin . It's so rare to find nearly all-white penguins, Stephens noted, because the birds' black and white color...